Automatic gluing machine



Aug. 5., 1930. -T.A. FEDERwlTz 1,772,344

AUTOMATIC GLUING MACHINE Filed April 29,4921 2 sheets-sheet. 1

l i I l I/ lll/f I INVENTOR. y l

A TTORNEY.

um Mgg@ Aug. 5, 1930.

T. A. FEDERwlTz l5772,344

AUTOMATIC GLUING MACHINE I Filed April 29, 1927 2 sheets-sheet 2 I o: l

K, u I' Il o l 'M 'TTVV H' \/j" W' I Lw m e@ l\ C \L t s :l

INVEN TOR.

2. ATTORNEY.

CTI

Patented Aug. l5, 1930 i UNITED, STATESy PATENT OFFICE.

THEODORE A. Fnnnnwrrz, or PHILADELPHIA., PENNSYLVANIA, AssIGNoarostrokes e SMITH COMPANY, oF PHILADELPHIA, PENNSYLVANIA, A CORPORATION orPENN-` SYLVANIA.

AUTOMATIC GL'U'ING MACHINE Application filed April 29,

My invention relates to a'mechanism for applying a coating, as ofadhesive, in succession to a. series of wrappers, labelssheets or thelike, hereinafter termed sheets.

In accordance with my invention a coating of adhesive applied 'to adistributing roller adapted to engage a sheet to be coated, is smoothedby a member, preferably intermittently rotatable, and more particularly,also cylindrical in `cross section. positioned in close, spaced relationto the distributing roller, and preferably interposed between thedistributing roller and a supply roller.

y Further in accordance with my invention, the .intermittently rotatablemember is actuated in timed relation with respect to the delivery of anobject or a series of objects in succession to the distributory rollerby the feedin mechanism for said objects.

f y invention resides in mechanism of a Character` hereinafter describedand claimed.

Fig. l is a fragmentary elevational view partly insection of anautomatic gluing machine in which my invention is incorporated.

Fig. 2 is a detail view of parts disclosed in Fig. 1.

Fig. 3 is a fragmentary end view in elevation, with parts in section, ofig. l.

Fig. 4 is a detail'` arrangementy of the supplying, transferI andapplying rolls.

Referring to the drawings, there are'supported upon the base or frame lchannel shaped track members 2, in which roll in a 'rectilinear path therolls 3 mounted upon stub shafts 4, mounted upon and supporting thecarriage 5. Secured upon the rock yshaft 6 are the levers '7 to whoseupper ends there are pivoted at 8 the link structures 9', pivoted to thecarriage 5 at 10, whereby the carriage 5 and the parts supported'thereonare reciprocated forwardly and backwardly for each sheet fed; Y

Upon` the vertically movable table or support `11,is disposed the stackS of sheets to be removed therefrom in succession.

By mechanism, not shown, but fully described in application Serial No.3,316, filed January 19, 1925, the table 11 is moved upwardly as thestack S diminishes in thickness. Disposed uponthe carriage 5 areupwardly 1927. Serial No. 187,646.

and rearwardly extending arms 18 in which 1s pivoted the shaft-19 uponwhich issecured the forwardly extending arms 2O in which is pivoted thesuction roll 21 having a suction port 27 communicating with the core 28continuously connected through pipes and tubes not shown, with a vacuumpump.

AdJustably secured to the carriage member 5 are'the brackets 5a, towhich is secured a bar 31 extended transversely to o posite sides ofmachine and supported upon lbar 31, are the bearings 32 of the idlerfeed rolls l33. Supported upon the bar is the tongue or guide member -35whose rear edge 36 is presented to the sheet-s as they are liftedby thesuction roll 21, and whose surface 37 guides the sheet to the feed roll33.

.Supported upon the frame 1 and positively driven, is the feed roll 38between which and the feed roll 33, each sheet 'is clamped as it is'withdrawn from the stack and fed' by the rolls 33 and 38 to the feedrolls 39 and 40, driven and idling, respectively, which advance thesheet from the guide member 41 to the glue or adhesive distributing roll42 yand the coacting guide. roller 43. These rolls advance the sheetonto the conveyor belt 44 which passes over the roller 45, as wellunderstood in the art.

The connection between the vacuum pump and the suction roll 21 includesa relief valve for discontinuing suction, which is periodi callyoperated by a member movable with the carriage 5 as is described in theapplication above referred to.

The parts so far described are indicated in Fig. 1 in their positions atthe beginning of a cycle, the carriage 5 and parts carried thereby beingin their extreme forward position.

'Shortly before reaching that position, suction is applied to thefroller21 so that as the carriage 5 and therefore the roller 21 approach theforward limit of travel, the latter shown, and simultaneously the roller21 is rotated in a clockwise direction.

After predetermined extent of rearward movement of the carriage 5 aridroller 21, the vacuum is broken, releasing the sheet from roller 21,whereupon the forward end of the sheet falls upon the guide surface 37of the member 35. Continued rearward movement of the carriage 5 movesthe tongue with relation to the sheet, which elevates the forward end ofthe sheet to such position that when the roller 33 comes into contactwith driven feed roll 38, it is clamped between them and advancedupwardly to the left by clockwise rotation of roller 38 towards feedrolls 39 and 40 over the guide 41. The cycle is completed when the partsare aproximately 1n the position shown in Fig. 2.

he sheet is forced into engagement with the feed rollers 39 and 40,thence between the adhesive coated roll 42 and the idler roller` 43; andthence to the conveyor belt 44.

The roller 42 is supplied with adhesive from a receptacle or tank 46suitably supported by the frame 1. The periphery of the roller 47 whichis continuously driven in a clockwise direction by gears 48 and 49mounted respectively on the shafts of rollers 42 and 47, dips below thesurface of the adhesive and transports it to the upper side of theroller, the scraper 50 being adjusted to ermit only the passage of aquantity suf- Eeient to maintain a suitable fountain of glue between therollers. The speed of rotation of the roller 47, which has theadditional function of keeping the adhesive mixed by rotating in it, isslow, to prevent excessive agitation which would result in foaming ofthe glue.

Previously, in mechanism of this character the fountain was maintainedbetween two, continuously rotating rollers in close, spaced relation.ith such construction, the coatin of adhesive on the rollercorresponding to ro ler 42 was not uniform or smooth but nonuniform andridged, due to the surface tension of the glue. In addition, therotation of both the supply roller and distributing roller in closerelation to each other caused the glue to foam due to the candy pullingeffect injecting a considerable amount of air into the glue.

My invention contemplates agitating the lue and transporting it to thevicinity of the distributing roller, that is, to a pocket formed by thedistributing roller and a scraper member. The transported adhesive,instead of forming a fountain between closely-spaced rotating rollers asheretofore, is transferred to a scraper member 51 resting against or inclose, spaced relation to the distributing roller 47 so that a wipingaction instead of a pulling out action of the glue results. As aconsequence the glue does not foam or form ridges on the distributingroller. In the ,hesive applying rollers, a

specific embodiment closed, the roller 47 both agitates the glue andtransports it. It is to be understood, however, that the adhesive may beagitated and transported by separate means or by a single means otherthan a roller.

Referring to Fig. 1, there is interposed between the adhesive supplyingand the adthird roller 51 mounted on a shaft 52 whose ends are supportedby the brackets 53 pivotally mounted on the cross-rod 54 extendinbetween the side frames 1. Each of the rackets 53 is provided with anoffset extension 55 having threaded engagement with the adjusting screw56 equipped with a hand wheel for convenience of manipulation, tocontrol the thickness of the coating on the roller 42.

On a prolongation of shaft 52 is mounted as shown Amost clearly in Fig.3, a ratchet disk 57 whose rear face contains a circular series ofindentations 58 which successively `co-operate with the spring-pressedlocking pawl 59 normally to retain the roller 51 in a stationaryposition with respect to roller 42. The roller 51 when stationary servesas a straight-edge and smoothens the glue adhering to the roller 42, sothat the coating of adhesive as applied to a sheet S is of substantiallyuniform thickness throughout, insuring a well wrapped box or article ofneat appearance.

The teeth in the periphery of the ratchet disk engage an actuating pawl59CL pivoted at one end of a lever 60 and maintained in engagement withthe ratchet disk by suitable biasing means as a spring 61. The lever 60is pivoted intermediate its ends on a stud shaft 62 threaded into theupper end of a standard 63 bolted or otherwise suitably fastened at itsbase to the frame 1. A spring 64 positioned between thelower end of thelever 60 and an extension 65 of the standard 63 normally maintains thelever in engagement with an adjustable abutment 66. which may be asshown, a screw threaded through an offset extension of the standard andprovided with a locking nut.

Passinr freely through extension 65 and an end of lever 60, is a rod orshaft 67 fastened to and movable with carriage 5, whose free end isthreaded and receives movable abutments 68 of such size or shape, orboth, that they can not pass through the hole in lever 60.

As the sheet-feeding mechanism before described nears the completion ofits cycle of operation, the abutments"68 at a time determined by theirposition on the shaft 67, are moved by the carriage 5 into engagementwith the lever 60, causing it to rotate about the shaft 62. The pawl59il moves the roller 51 through an angle whose magnitude dependsuponthe original position of lever 60 which is determined as beforestated by the of my invention disstop pin 66. As the face of the lockingpawl or detent 59 is cone shaped, it offers but little resistance to theactaution by the pawl 59E. When the carriage 5 reverses its movement,

`the spring 64 returns the lever 60 to its original position, the pawl59 riding idly over the ratchet teeth.

While the roller 51 is stationary,it func-l tions as a scraper andnormally, if it were permitted to remain in such condition, wouldcollect a considerable amount of foreign mat ter which after a timewould contaminate the glue, collect in lumps or projections and defeatthe very urpose of the stationary roll. Further the rol er surfaceunder'that condition Would be subjected to wear which would destroy itsutility. l

By intermittently rotating the roller 51 at comparatively shortintervals, there is pre vented any accumulation of foreign matter in theadhesive reservoir between the rolls. In other words, a cleaningoperation is effected. It should also be noted that the direction ofrotation is such that a fresh supply of adhesive is transported by theroller 51 .to the Well of a reservoir between rollers 51 and 42 eachtime that it is stepped around by the pawl. It is apparent also that bysuch rotation, any wear is distributed over the entire surface of theroller.

As the rotation of this roller is timed, as explained above, withrespect to the sheet to which glue is to be applied, ordinarily theportion ofthe roller 42 at which there is any slight irregularity of theadhesive layer due to relative movement' of rollers 42 and 51 for abrief interval, does not come 'intocontact with the sheet to which glueis to be ap lied.

It is to be understood that in the road aspect of my invention, it isnot essential that the member 51 rotate at all to prevent theundesirable foaming and ridges referred to and further,"-that ifsuchmember is rotated for the purposes stated, it is not necessarilycir- A cular in cross-section. Preferably, however,

it is cylindrical and rotates periodically in timed relation to thesheet-feeding mechanism.

`What I claim is:

1.v In a machine for applying a coating of adhesive to individualsheetsfa distributing roller adapted to engage said sheets insuccession, a roller to transport adhesive, a ro-v tatable memberinterposed between said rollers in close, spaced relation to saiddistributing roller, and means intermittently to rotate said rotatablemember. 2. In a machine for applying a coating o adhesive to individualsheets, a distributing roller adapted to engage said sheets insuccession, a roller to transport adhesive, a rotatable memberinterposed between said rollers in close, spaced relation to saiddistributing roller, and means intermittently to rotate said rotatablemember in a direction opposite to that of said distributing roller..

3. In a machine for applying a coating of adhesive to individual sheets,a distributing roller adapted to engage said sheets in succession, aroller to transport adhesive, a third roller interposed between saidrollers in close, spaced relation to said distributing roller, and meansintermittently to rotate said third roller. b

4:. In a machine for applyin a coatingof adhesive to a sheet, a,'distrigbuting roller adapted toengage said sheet, a roller to agiitate and transport adhesive, and a member interposed between saidrollers in close, spaced relation to` said distributing roller andstationary with respect thereto to effect smoothing of an adhesivecoating on the surface of said distributing roller.

5. In a machine for applying a coating of adhesive to individual sheets,a distributing roller adapted to engage said sheets in succession, aroller to agitate and transport adhesive, a rotatable member inter osedbetween said rollers in close, space relation to sai-d distributingroller, and means inter` rotatable scraper member in close, spaced`relation to said roller, and means operating in timed relation to saidfeedin means inter mittently to rotate said rotata le means.'

8. In combination, aroller, means for applying a coating of adhesive tosaid roller, means to feed in succession. a series of sheets to saidroller, rotatable means in close, spaced relation to said rollernormally stationary to smoothen said coating, and means intermittentlyoperating in timed relation to said feeding means to rotate saidrotatable means in a direction opposite to that of said roller.

9. In a machine for applying a coating of adhesive to a series of sheetsin succession,an adhesive applying roller adapted to` engage' saidsheets successively, an adhesive-transporting roll'er, a rotatablescraper means interposed `between said rollers, and means o erating intimed relation to delivery `of s eetsto said first rollerintermittentlyto rotate said rotatable means.

10. In a machine for applying a coating of adhesiveto a series of sheetsin succession, an

radhesive-applying roller ada ted to engage said sheets successively, ana hesive-supplying roller, rotatable scraper means interposed betweensaid rollers, and means operating in timed relation to delivery ofsheets to said first roller `intermittently to rotate said rotatablemeans in a direction' opposite to that of said first named roller.

11. In a machine for applying adhesive to a series of sheets insuccession, an adhesiveapplying roller adapted to engage said sheetssuccessively, an adhesive supply roller therefor, a third rollerinterposed between said first named rollers, and means operating intimed relation to delivery of sheets to said iirst roller intermittentlyto rotate said third roller.

12. In a machine for applyin a coating of adhesive to a sheet, a distriu ting` roller adapted to engage said sheet, an essentially non-rotatingscraper member positioned adjacent said roller and forming a pocket, a v

container for adhesive, and a slowly revolving roller to agitateadhesive in said container and to transport it to said pocket to form afountain of adhesive.

13. In a machine for applying a coating of adhesive to individualsheets, an adhesivecoated roller adapted to engage said sheets, means toapply adhesive to said roller, a member having increments of surfaceadapted individually to be positioned closely ad-l jacent said roller tosmoothen adhesive thereon, and means intermittently to actuate saidmember to present a freshsurface thereof.

14. In a machine for applying a coating of adhesive to individualsheets, a roller adapted to apply adhesive to said sheets, means toapply a coating of adhesive to said roller, rotatable means closelyadjacent the coated surface of said roller, and means intermittently torotate said means in direction opposite to direction of rotation of saidroller.v

15. In a machine for applying a coating of adhesive to a sheet, anadhesive-coated roller adapted to engage said sheet, a scraper memberadjacent said roller and stationary with respect thereto to smoothen theadhe-y sive-coating thereon, and means to transport adhesive to theregion of proximity of said roller and scraper.

16. In a machine for applying a coating of `adhesive to a sheet, acontinuously revolving distributing roller adapted to engage sai sheet,a continuously revolving adhesive transporting roller, and anessentially nonrotatin wipin member disposed between said ro lers an inclose spaced relation to said distributing roller to smoothen adhesivethereon.

THEODORE A. FEDERVVITZ.

